... place adapt unlimited times of alternately cold or hot use pvc cold and hot packApplicationCold compress: headache, fever, toothache, sunstroke, ... , rheumatism, menorrhalgia, stomach trouble, cervical vertebra trouble, sciatica, and strain of lumbar muscles etc.Characteristics 1.no side effect ... The scientific prescription makes the bag elastic and it can remain soft for a long time in the minus 18 ...